Container and closure therefor

ABSTRACT

A bag having a relatively large diameter, closure or valve, the components of which are formed in molds using a one piece mold cavity. The three components of the valve include a base having a flange positioned within the bag and a neck extending through an opening in the bag, a collar which clamps the bag to the base and a cap which forms a seal with the neck of the base. The collar and base have complementary, vertically extending beads to grip the bag material and the cap has a dome shaped central portion which seals against the inner surface of the neck.

United States Patent [191 Weikert I 4 Jan. 8, 1974 CONTAINER AND CLOSURE THEREFOR [76] Inventor: Roy J. Weikert, c/o General Films,

Inc, Covington, Ohio 22 Filed: June 20,1972

211 App]. No.: 264,488

[52] US. Cl. 150/8 [51] Int. Cl B65d 33/16, B65d 39/00 [58] Field of Search 150/8; 220/315; 285/202, DIG. 22, DIG. 2

[56] References Cited UNITED STATES PATENTS 3,212,681 10/1965 Weikert 222/183 3,343,700 9/1967 Heub] 215/41 5/1945 Amberg 285/202 Primary Examiner-Herbert F. Ross Attorney-Lawrence B. Biebel et al.

[5 7] 7 ABSTRACT A bag having a relatively large diameter, closure or valve, the components of which are formed in molds using a one piece mold cavity. The three components of the valve include a base having a flange positioned within the bag and a neck extending through an opening in the bag, a collar which clamps the bag to the base and a cap which forms a seal with the neck of the base. The collar and base have complementary, vertically extending beads to grip the bag material and the cap has a dome shaped central portion which seals against the inner surface of the neck.

20 Claims, 5 Drawing Figures CONTAINER AND CLOSURE THEREFOR BACKGROUND OF THE INVENTION US. Pat. No. 3,212,681 discloses a container which includes a bag having a fill port assembly or valve attached thereto for filling the bag with a liquid, such as milk. The valve components include a frustoconical backing member having horizontally oriented, circumferential grooves and a retainer having horizontally oriented friction rings which engage the grooves and lock the retainer and backing member to the bag.

While a valve assembly of this type has met with substantial commercial success, it will be apparent that unless an extremely flexible material is used for the valve components, which would be unacceptable, particularly with large diameter closures, the backing member and retainer must be formed in molds utilizing multi' piece mold cavities to permit the mold cavities to be removed from the components because of the horizontally projecting grooves and friction rings. 7

The use of two-piece mold cavities, however, can result in flash at the parting line of the mold cavity sections, preventing accurate mating of the valve components and giving rise to leakage from the bag. Additionally, the presence of flash can cause damage to the film itself. It will also be apparent that because such mold cavities include moving parts they have a shorter life and also that wearing of the mold sections can cause offsize valve components and flash, with the amount of flash increasing proportionately to the amount of wear.

Additionally, the substantially horizontal orientation of the grooves and friction rings produces a shearing action on the film gripped between the components as the valve components are forced together. Further, it will be seen that this shearing action will be increased with relatively large diameter valve members as well as the force necessary to interlock the two parts.

In the valve assembly of the above noted patent, a resilient cap is provided with a groove which receives a projection on the backing member and a lip which is received in a groove on an inner surface of the backing member. Again, where relatively large diameter closures are desired. the interlocking of the cap with the valve assembly requires special tools since the interfitting portions of the cap and the backing member will be somewhat less flexible due to their increased size and proportional increase in thickness. It will also be noted that, particularly with large diameter closures the problem of the cap being dislodged from the valve assembly is greater because of the greater surface area of the cap exposed to internal pressures.

SUMMARY OF THE INVENTION The present invention provides a container having a valve assembly or closure particularly adapted as a large diameter closure. As in prior valve assemblies, the valve consists of three components, including a base member, a collar and a closure cap. However, the base member and collar are provided with interlocking annular beads which are substantially vertically oriented.

This permits both the base member and the collar to be formed in molds using one-piece mold cavities and readily removed from the molds upon curing. Thus, the problems which result from wearing of the mold parts and the formation of flash on the valve components are obviated. Additionally, any shearing forces imposed on the bag material when the base member and collar are locked together are appreciably less than with substantially horizontally oriented ribs and grooves The collar is of smaller internal diameter than the outer diameter of the base member, placing the collar where installed on the base member under appreciable tension. In addition to the above noted interlocking beads, the collar and base member are provided with complementary sloping surfaces, so that the tension of the collar tends to cause the collar to ride downwardly on the base member, drawing the film gripped between the collar and base member more tightly across the beads. The constant tension between'the collar and base member tends to flatten and widen the beads as they are forced into contact with each other, further enhancing the film gripping action.

The closure cap includes a dome shaped central portion which is received within the neck of the base member and bears against the inner surface thereof. The dome shaped portion of the cap bulges inwardly of the container so that any increase in pressure in the container will tend to flatten the dome shaped portion, pressing the closure capwith increase pressure against the interior surface of theneck portion of the base member.

Thus, the greater the pressure acting against the closure cap and tending to dislodge it from the valve assembly, the greater the sealing action of the cap. Despite the fact that the closure cap of the present invention provides an improved seal, the absence of elaborate interfitting ribs and grooves renders it. relatively easy to apply to the valve assembly. Thus, although the valve assembly is of relatively large diameter as compared to prior art assemblies, the closure cap can be applied manually if desired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view, showing the container and valve assembly of the present invention;

FIG. 2 is a cross sectional view of a portion of the container and the valve assembly thereof;

FIG. 3 is a cross sectional view of a portion of the base member;

FIG. 4 is a cross sectional view of a portion of the collar; and

FIG. 5 is a cross sectional view through a portion of the closure cap.

DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference initially to FIG. 1 of the drawings, it will be seen that a container 10 in accordance with the present invention may include opposed flexible walls, one of which is shown at 12 in FIG. 1, seamed by heat sealing or the like around their periphery, as at 14, to

form a closed flexible bag. A vale assembly 16 is mounted in one wall of the container and consists of three components, including, as seen in FIG. 2, a base member 18, a collar 20 and a closure cap 22.

With reference to FIGS. 2 and 3 of the drawings, it will be seen that the base member 18 includes a relatively large flange section 24 which is received within the bag in surrounding relationship to an opening 26 formed therethrough and a smaller neck portion 28 projecting through the opening 26. The neck and flange portions of the base member each have smooth inner surfaces 30 and 32, respectively, which merge together to provide a smooth, continuous, inner surface 34 on the base member.

The outer surface of the base member, as best seen in FIG. 3, extends generally parallel to the inner surface 34 thereof and includes an outwardly directed lip portion 36 extending substantially parallel to the lower terminal portion of the inner surface 32 of the flange section. While the valve assembly may be oriented in any location in the container with which it is associated, for convenience in description the terms lower and upper will be used herein with reference to the flange section 24 and neck portion 28, respectively.

An overhanging shoulder 38 projects over a portion of the lip 36 and has upper and lower surfaces 40 and 42, respectively. The upper surface 40 extends substantially parallel to the upper surface of the lip portion 36 and is connected to the lower surface 42 by an upwardly and inwardly sloping wall 43. The lower surface 42 extends upwardly and outwardly at approximately 45 to upper surface 40 and is joined to lip 36 by a semi-circular portion 44, and, as explained below, provides an inwardly and downwardly acting camming force with a complementary portion of the collar 20.

Progressing upwardly along the outer surface of the base member 18, it will be seen that a first bead 46 projects upwardly from the upper surface 40 of the shoulder 38 and tapers in cross sectional configuration to an upper end 48 of substantially semi-circular configuration. A second bead 50 also projects upwardly and terminates in a semi-circular upper end 52 positioned above the upper end 48 of the bead 46.

Adjacent walls 54 and 56 of the beads 50 and 46 are interconnected by a semi-circular portion 58, and it will be noted from FIG. 3 that wall 54 is provided with an offset portion 60 between the upper end 52 of the bead and the semi-circular connecting wall 58 which extends upwardly and outwardly at approximately 45. An opposite wall 62 of the bead 50 sloped inwardly and downwardly from the upper end thereof and terminates in a semi-circular connecting portion 64, while an opposite wall 65 of bead 46 slopes outwardly and downwardly to the upper surface 40.

An upwardly and inwardly sloping wall 66 extends from the connecting wall 64 to the upwardly and outwardly sloping lower surface 68 of a nose 70 which also includes an upper surface 72 sloping upwardly and inwardly of the base member 18. The surface 68, similar to surface 42, slopes upwardly and outwardly at an angle of approximately 45 and cooperates with a complementary portion on the collar 20 to provide an inwardly and downwardly acting camming force. Above the nose 70, a bulbous portion 74 projects outwardly from the outer surface of the base member and an up.- wardly projecting lip 75 extends substantially parallel to a terminal portion of the inner surface 30 of the neck portion 28.

As noted above, the valve assembly 16 also includes a collar portion 20 which, as seen in FIGS. 2 and 4, has an inner surface complementary to the outer surface of the base member 18 from the lip 36 to the juncture of the upper and lower surface of the nose 70. As a result, a portion of the flexible wall 12 adjacent to opening 26 therethrough may be clamped between the complementary inner and outer surface of the collar and base member, respectively, as seen in FIG. 2 of the drawings.

In this regard, it will be seen that a third head 76 having an offset 77 projects downwardly and is received between beads 46 and 50 and a fourth bead 78 also projects downwardly and is received between walls 62 and 66. The nose 70, offset 60 and shoulder 38 of the base member define outwardly projecting means which overhang portions of the base member outer surface situated beneath them to provide an interlock with complementary portions of the collar 20 and retain the vertically oriented beads 46, 50, 76 and 78 in engagement.

As is apparent from FIGS. 2, 3 and 4, offset 77 and surfaces 79 and 80 slope upwardly and outwardly at approximately 45 and are complementary to offset 60 and surfaces 42 and 68, respectively. Collar 20 is formed with a smaller internal diameter than the external diameter of base member 18, placing collar 20 under appreciable tension. This tends to cause the collar to ride downwardly on the base member due to the camming action of the offsets 60 and 77 and the surface 42 and 79 and 68 and 80. This in turn causes the beads 46, 50, 76 and 78 to press more tightly into contact with each other flattening and broadening the beads and causing the film to draw tightly across the beads. Thus, despite the absence of horizontally extending beads a substantial gripping force is exerted on the film.

Additionally, the collar 20 includes a top surface 81 extending substantially parallel to the lip 36 and terminating in an upper, outwardly projecting flange 82. The collar 20 also includes a lower, outwardly projecting flange 83 which extends in spaced parallel relationship to the flange 82 and is joined thereto by an outer surface 84 extending substantially perpendicularly therebetween.

With this construction it will be apparent that the valve assembly may be attached to a box or other rigid container for the bag 10 by slipping the collar 20 into a key-hole shaped slot in a wall of the outer container with the flanges 82 and 83 engaging opposite sides of the wall of the box in which the key-hole slot is formed.

The valve assembly also includes a closure cap 22 which is best shown in FIGS. 2 and 5 of the drawings. The closure cap 22 includes an outwardly projecting flange 86 having an annular wall 88 projecting substantially perpendicularly downwardly from an inner edge 90 thereof. A dome shaped portion 92 extends across the closure cap 22 from the lower edge of the annular wall 88 and the dome shaped portion bulges under radial compression inwardly of the container when the valve components are in their assembled relationship.

A locking flange 94 extends downwardly from a medial portion of the flange 86 in spaced relationship to the annular wall 88 and is provided with a detent 96 to receive, as seen in FIG. 2 of the drawings, the bulbous portion 74 of the base member 18. Additionally, when the cap is received on the neck of the base member, the lip 75 of the base member will be received between the annular flange 88 and the upper portion of the locking flange 94.

With the above constructions, it will be seen that the sealing beads 46 and 50 of the base member and the beads 76 and 78 of the collar 20 are substantially vertically oriented rather than horizontally as in the prior art. Because of this design, the valve components may be formed in a one-piece mold cavity and still be of sufficient rigidity to provide the strength necessary in relatively large diameter assemblies for which the valve assembly of the present invention is particularly adapted.

At the same time, the cooperating camming effect of offsets 60 and 77 and sloped surfaces 42, 79, 68 and 80 cause the highly tensioned collar to ride downwardly on the base member, flattening and broadening the beads and pulling the film tightly thereover; thereby clamping the film between the surfaces and forming a tight seal.

Through the use of a one-piece mold cavity made possible by the design of the present invention, the problems of flash associated with a two-piece mold cavity are avoided. Additionally, it will be apparent that less shearing action is imposed on the wall of the container clamped between the base member and the collar than would be the case if the interlocking beads were horizontally rather than vertically oriented.

With regard to the closure cap 20, it will be seenthat the dome shaped portion 92 provides a tight seal with the inner surface of the neck portion of the base member and any internal pressure acting on the dome shaped portion 92 will actually increase the sealing contact of the closure cap with the base member.

While the valve assembly compoents may be constructed of a variety of materials and any suitable flexible material may be used for the walls of the bag, in-

both cases it will be apparent that material selected must also be inert with the product being packaged.

While the product herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise product, and that changes may be made therein without departing from the scope of the invention.

What is claimed is:

l. A container comprising:

a. a flexible wall having means defining an opening therethrough,

b. a base member having a relatively large flange positioned on one side of said flexible wall in surrounding relationship to said opening therethrough and a relatively smaller neck portion projecting upwardly from said base member and extending through said opening,

c. said flange and said neck portion having smooth inner surfaces merging together and defining a smooth, continuous, inner surface of said base member,

d. an outer surface of said base member extending generally parallel to said inner surface thereof,

e. first and second beads projecting upwardly from said base member outer surface in spaced relationship to each other and approximately parallel to said neck portion of said base member,

f. said beads tapering to substantially circular upper ends and being joined at lower ends of adjacent side walls by a substantially semi-circular connecting portion,

g. outwardly projecting means overhanging a portion of said base member outer surface and having a lower surface sloping upwardly and outwardly,

h. a collar having an inner surface complementary to a portion of said base member outer surface including said first and second beads and said upwardly and outwardly sloping surface,

i. said collar inner surfaces including a third bead projecting downwardly therefrom and having a tapered cross sectional configuration and a substantially semi-circular lower end received between said first and second ribs in engagement with said substantially semi-circular connecting portion, j. a closure cap including:

5 i. an outwardly projecting flange,

ii. an annular wall projecting downwardly from said outwardly projecting flange, and

iii. a dome shaped portion extending across said closure member from a lower edge of said annular wall,

k. said closure cap being received on said neck portion of said base member with said annular wall engaging said inner surface thereof.

2. The container of claim 1 wherein said closure cap 15 further comprises:

a. a flange member projecting downwardly from said outwardly projecting flange in spaced relationship to said annular wall and receiving said neck portion therebetween.

3. The container of claim 2 further comprising:

a. a bulbous portion projecting outwardly from said outer surface of said base member at said neck portion thereof, and

b. means defining a detent in said flange member of said closure cap complementary to said bulbous portion and receiving said bulbous portion therein.

4. The container of claim 1 further comprising:

a. a fourth bead projecting downwardly from said inner surface of said collar in spaced relationship to said third bead, and

b. said second bead being received between said third and fourth beads.

5. The container of claim 1 further comprising:

a. means defining an offset in said adjacent wall of said second bead, and

b. said inner surface of said collar having a portion complementary to said offset portion.

6. The container of claim 1 wherein said outwardly 40 projecting means includes:

a. an overhanging shoulder having an upper surface connected to a wall of said first bead opposite said adjacent wall thereof.

7. The container of claim 1 wherein said outwardly projecting means includes:

l a. a nose having sloped upper and lower surfaces,

b. said lower surface of said nose sloping upwardly and outwardly of said base member. I

8. The container of claim 7 wherein said outwardly projecting means further includes:

a. an overhanging shoulder having a lower surface sloping upwardly and outwardly of said base memher.

9. The container of claim 1 wherein said collar further comprises:

a. upper and lower outwardly projecting flanges extending in spaced parallel relationship to each other, and

b. an outer surface extending substantially perpendicularly between and interconnecting said upper and lower flanges. 1 10. A container comprising: a. a flexible wall having means defining an opening therethrough,

b. a base member having a relatively large flange positioned on one side of said flexible wall in surrounding relationship to said opening and a smaller neck portion projecting upwardly from said base member and extending through said opening,

c. said flange and said neck portion having smooth inner surfaces merging together and defining a smooth, continuous inner surface of said base member,

d. an outer surface of saidbase member including:

i. an outwardly directed lip extending substantially parallel to a terminal portion of said inner surface of said flange,

ii. an overhanging shoulder projecting over a portion of said lip, having an upper surface substantially parallel thereto and connected thereto by an upwardly and outwardly sloped lower surface and a semi-circular portion,

iii. a first bead projecting upwardly from said upper surface of said shoulder and tapering to an upper end of semi-circular cross sectional configuration,

iv. a second bead projecting upwardly and terminating in an upper end of semi-circular cross sectional configuration positioned farther above said lip than said upper end of said first bead,

v. adjacent walls of said first and second beads being interconnected by a semi-circularly cross sectioned connecting portion,

vi. an opposite wall of said second bead sloping outwardly away from said upper end thereof and terminating in a semi-circularly cross sectioned portion,

vii. an outwardly projecting nose having sloped upper and lower surfaces,

viii. an interconnecting wall sloping downwardly and outwardly from said lower surface of said nose to said opposite wall of said second bead and connected thereto by a semi-circularly cross sectioned portion,

ix. a bulbous portion projecting outwardly above said nose, and

x. an upwardly projecting lip extending substantially parallel to a terminal portion of said inner surface of said neck portion,

e. a collar including:

i. an inner surface complementary to said outer surface of said base member from said lip to the juncture of said upper and lower surface of said nose,

ii. a top surface extending substantially parallel to said lip and terminating in an upper, outwardly projecting flange, and

iii. a lower, outwardly projecting flange extending in spaced parallel relationship to said upper, outwardly projecting flange and joined thereto by an outer surface extending substantially perpendicularly therebetween,

f. a portion of said flexible wall adjacent said opening therethrough being clamped between said complementary inner and outer surfaces of said collar and said base member, and

g. a closure cap including:

i. an outwardly projecting flange,

ii. an annular wall extending substantially perpendicularly inwardly of said base member from an inner edge of said outwardly projecting flange,

iii. a dome shaped portion extending across said cap from a lower edge of said annular wall, and

iv. a locking flange having a detent therein complementary to said base member bulbous portion and extending from a medial portion of said outwardly projecting flange in spaced relationship to said annular wall,

h. said closure cap being received on said neck portion of said base member with said annular flange thereof engaging said inner surface of said neck portion and said bulbous portion of said base member received in said closure cap detent.

11. A container closure comprising:

a. a hollow base member including a flange portion adapted to overlie a portion of a container wall adjacent an opening therethrough and an axially extending neck portion adapted to project from said flange portion through said opening,

b. means on an outer surface of said base member at said flange portion thereof defining bead means projecting axially of said base member away from said flange portion thereof,

c. offset portions on said head means on said outer surface of said base member defining sloped camming surface means sloping outwardly of said base member away from said flange portion thereof,

d. a collar engageable with said base member and having an inner surface complementary to at least those portions of said base member including said bead means and said camming surface means, and

e. the internal diameter of said collar means and the external diameter of said base member in the area of contact therebetween being related to each other such that said collar is under tension when mounted on said base member.

12. A container closure comprising:

a. a hollow base including a flange portion adapted to overlie a portion of a container wall adjacent an opening therethrough and an axially extending neck portion adapted to project from said flange portion through said opening,

b. a collar engageable with said base and having an inner surface complementary to an outer surface of said base member,

c. the internal diameter of said collar and the external diameter of said base in the area of contact therebetween being related to each other such that said collar is under tension when mounted on said base,

cl. said complementary inner and outer surfaces of said base and collar including interengaging bead means projecting axially of said base approximately parallel to said neck portion and away from said flange portion thereof, and

e. means on said complementary inner and outer surfaces of said base and collar defining sloped camming surface means sloping outwardly of said base member away from said flange portion thereof.

13. The closure of claim 12 wherein:

a. said camming surface means includes outwardly sloping surfaces positioned on opposite sides of said bead means.

14. The closure of claim 12 wherein:

a. said inner diameter of said collar is less than said outer diameter of said base member.

15. The closure of claim 12 wherein said bead means on said base member comprise:

a. spaced apart beads tapering to a smallest dimension in a direction away from said flange of said base member.

16. The closure of claim 12 further comprising:

a. a closure cap received on said neck portion of said base member.

17. The closure of claim 16 wherein saidclosure cap comprises:

a. a dome portion receivable within said neck portion in sealing engagement with an inner surface thereof.

18. The closure of claim 12 further comprising:

a. a'closure cap having a dome portion adapted to be received in said neck portion of said base with said dome member engaging under radial compression an inner surface of said neck portion.

19. The closure of claim 18 wherein:

a. said dome portion of said closure cap comprises a substantially annular wall and'a dome shaped portion curved outwardly toward said flange portion of said base member. 20. The closure of claim 18 wherein said closure cap 5 further comprises:

and receivable therein. 

1. A container comprising: a. a flexible wall having means defining an opening therethrough, b. a base member having a relatively large flange positioned on one side of said flexible wall in surrounding relationship to said opening therethrough and a relatively smaller neck portion projecting upwardly from said base member and extending through said opening, c. said flange and said neck portion having smooth inner surfaces merging together and defining a smooth, continuous, inner surface of said base member, d. an outer surface of said base member extending generally parallel to said inner surface thereof, e. first and second beads projecting upwardly from said base member outer surface in spaced relationship to each other and approximately parallel to said neck portion of said base member, f. said beads tapering to substantially circular upper ends and being joined at lower ends of adjacent side walls by a substantially semi-circular connecting portion, g. outwardly projecting means overhanging a portion of said base member outer surface and having a lower surface sloping upwardly and outwardly, h. a collar having an inner surface complementary to a portion of said base member outer surface including said first and second beads and said upwardly and outwardly sloping surface, i. said collar inner surfaces including a third bead projecting downwardly therefrom and having a tapered cross sectional configuration and a substantially semi-circular lower end received between said first and second ribs in engagement with said substantially semi-circular connecting portion, j. a closure cap including: i. an outwardly projecting flange, ii. an annular wall projecting downwardly from said outwardly projecting flange, and iii. a dome shaped portion extending across said closure member from a lower edge of said annular wall, k. said closure cap being received on said neck portion of said base member with said annular wall engaging said inner surface thereof.
 2. The container of claim 1 wherein said closure cap further comprises: a. a flange member projecting downwardly from said outwardly projecting flange in spaced relationship to said annular wall and receiving said neck portion therebetween.
 3. The container of claim 2 further comprising: a. a bulbous portion projecting outwardly from said outer surface of said base member at said neck portion thereof, and b. means defining a detent in said flange member of said closure cap complementary to said bulbous portion and receiving said bulbous portion therein.
 4. The container of claim 1 further comprising: a. a fourth bead projecting downwardly from said inner surface of said collar in spaced relationship to said third bead, and b. said second bead being received between said third and fourth beads.
 5. The container of claim 1 further comprising: a. means defining an offset in said adjacent wall of said second bead, and b. said inner surface of said collar having a portion complementary to said offset portion.
 6. The container of claim 1 wherein said outwardly projecting means includes: a. an overhanging shoulder having an upper surface connected to a wall of said first bead opposite said adjacent wall thereof.
 7. The container of claim 1 wherein said outwardly projecting means includes: a. a nose having sloped upper and lower surfaces, b. said lower surface of said nose sloping upwardly and outwardly of said base member.
 8. The container of claim 7 wherein said outwardly projecting means further includes: a. an overhanging shoulder having a lower surface sloping upwardly and outwardly of said base member.
 9. The container of claim 1 wherein said collar further comprises: a. upper and lower outwardly projectiNg flanges extending in spaced parallel relationship to each other, and b. an outer surface extending substantially perpendicularly between and interconnecting said upper and lower flanges.
 10. A container comprising: a. a flexible wall having means defining an opening therethrough, b. a base member having a relatively large flange positioned on one side of said flexible wall in surrounding relationship to said opening and a smaller neck portion projecting upwardly from said base member and extending through said opening, c. said flange and said neck portion having smooth inner surfaces merging together and defining a smooth, continuous inner surface of said base member, d. an outer surface of said base member including: i. an outwardly directed lip extending substantially parallel to a terminal portion of said inner surface of said flange, ii. an overhanging shoulder projecting over a portion of said lip, having an upper surface substantially parallel thereto and connected thereto by an upwardly and outwardly sloped lower surface and a semi-circular portion, iii. a first bead projecting upwardly from said upper surface of said shoulder and tapering to an upper end of semi-circular cross sectional configuration, iv. a second bead projecting upwardly and terminating in an upper end of semi-circular cross sectional configuration positioned farther above said lip than said upper end of said first bead, v. adjacent walls of said first and second beads being interconnected by a semi-circularly cross sectioned connecting portion, vi. an opposite wall of said second bead sloping outwardly away from said upper end thereof and terminating in a semi-circularly cross sectioned portion, vii. an outwardly projecting nose having sloped upper and lower surfaces, viii. an interconnecting wall sloping downwardly and outwardly from said lower surface of said nose to said opposite wall of said second bead and connected thereto by a semi-circularly cross sectioned portion, ix. a bulbous portion projecting outwardly above said nose, and x. an upwardly projecting lip extending substantially parallel to a terminal portion of said inner surface of said neck portion, e. a collar including: i. an inner surface complementary to said outer surface of said base member from said lip to the juncture of said upper and lower surface of said nose, ii. a top surface extending substantially parallel to said lip and terminating in an upper, outwardly projecting flange, and iii. a lower, outwardly projecting flange extending in spaced parallel relationship to said upper, outwardly projecting flange and joined thereto by an outer surface extending substantially perpendicularly therebetween, f. a portion of said flexible wall adjacent said opening therethrough being clamped between said complementary inner and outer surfaces of said collar and said base member, and g. a closure cap including: i. an outwardly projecting flange, ii. an annular wall extending substantially perpendicularly inwardly of said base member from an inner edge of said outwardly projecting flange, iii. a dome shaped portion extending across said cap from a lower edge of said annular wall, and iv. a locking flange having a detent therein complementary to said base member bulbous portion and extending from a medial portion of said outwardly projecting flange in spaced relationship to said annular wall, h. said closure cap being received on said neck portion of said base member with said annular flange thereof engaging said inner surface of said neck portion and said bulbous portion of said base member received in said closure cap detent.
 11. A container closure comprising: a. a hollow base member including a flange portion adapted to overlie a portion of a container wall adjacent an opening therethrough and an axially extending neck portion adapted to project from said flange portion through said opEning, b. means on an outer surface of said base member at said flange portion thereof defining bead means projecting axially of said base member away from said flange portion thereof, c. offset portions on said bead means on said outer surface of said base member defining sloped camming surface means sloping outwardly of said base member away from said flange portion thereof, d. a collar engageable with said base member and having an inner surface complementary to at least those portions of said base member including said bead means and said camming surface means, and e. the internal diameter of said collar means and the external diameter of said base member in the area of contact therebetween being related to each other such that said collar is under tension when mounted on said base member.
 12. A container closure comprising: a. a hollow base including a flange portion adapted to overlie a portion of a container wall adjacent an opening therethrough and an axially extending neck portion adapted to project from said flange portion through said opening, b. a collar engageable with said base and having an inner surface complementary to an outer surface of said base member, c. the internal diameter of said collar and the external diameter of said base in the area of contact therebetween being related to each other such that said collar is under tension when mounted on said base, d. said complementary inner and outer surfaces of said base and collar including interengaging bead means projecting axially of said base approximately parallel to said neck portion and away from said flange portion thereof, and e. means on said complementary inner and outer surfaces of said base and collar defining sloped camming surface means sloping outwardly of said base member away from said flange portion thereof.
 13. The closure of claim 12 wherein: a. said camming surface means includes outwardly sloping surfaces positioned on opposite sides of said bead means.
 14. The closure of claim 12 wherein: a. said inner diameter of said collar is less than said outer diameter of said base member.
 15. The closure of claim 12 wherein said bead means on said base member comprise: a. spaced apart beads tapering to a smallest dimension in a direction away from said flange of said base member.
 16. The closure of claim 12 further comprising: a. a closure cap received on said neck portion of said base member.
 17. The closure of claim 16 wherein said closure cap comprises: a. a dome portion receivable within said neck portion in sealing engagement with an inner surface thereof.
 18. The closure of claim 12 further comprising: a. a closure cap having a dome portion adapted to be received in said neck portion of said base with said dome member engaging under radial compression an inner surface of said neck portion.
 19. The closure of claim 18 wherein: a. said dome portion of said closure cap comprises a substantially annular wall and a dome shaped portion curved outwardly toward said flange portion of said base member.
 20. The closure of claim 18 wherein said closure cap further comprises: a. a locking flange projecting from said closure cap in spaced relationship to said dome portion thereof, b. means defining a detent on an inner surface of said locking flange, and c. means defining an outwardly projecting bulbous portion on an outer surface of said neck portion of said base member complementary to said detent and receivable therein. 